System Method and Device for Performing Heat Stress Tests

A device for testing for heat stress of a person, comprising:

• a plurality of sensors communicatively coupled to the person to capture information of a heart rate of the person;
• a controller in communication with the plurality of sensors to receive data of the heart rate of the person;
• wherein said controller is programmed to:
• determine a first heart rate of the person at the end of a first time period during which the heart rate of the person maintained at least a first predetermined heart rate;
• after the first time period, determine a second heart rate of the person at the end of a second time period during which the heart rate of the person did not exceed a second predetermined heart rate;
• wherein the first predetermined heart rate is greater than the second predetermined heart rate;
• determine that the heart rate of the person transitioned from at least the first predetermined heart rate to no greater than the second predetermined heart rate within a predetermined transition time period;
• determine a heart rate recovery by subtracting the second heart rate from the first heart rate;
• determine a heart rate recovery ratio by dividing the heart rate recovery by a heart rate recover baseline;
• and
• provide a notification if the heart rate recovery ratio is beyond a threshold.

A method of testing for heat stress of a person, comprising:

• determining a first heart rate of the person at the end of a first time period during which the person maintained at least a predetermined first exertion level;
• determining a second heart rate of the person at the end of a second time period during which the person did not exceed a second exertion level;
• wherein the first exertion level is greater than the second exertion level;
• determining a heart rate recovery as the first heart rate minus the second heart rate;
• determining a heart rate recovery ratio by dividing the heart rate recovery by a heart rate recover baseline;
• and
• providing a notification if the heart rate recovery ratio is beyond a threshold.